NET$MGMT_HELP.HLB  —  routing
   The Routing module implements the Network Routing layer described by the
   Digital Network Architecture.

   The entities that constitute the ROUTING  module are listed below. The
   indention indicates the hierarchical relationships between the entities.

                                Routing
                                   Destination area
                                   Destination node
                                   IP destination address
                                   Port
                                   Permitted neighbor
                                   EGP group
                                      EGP neighbor
                                   Circuit
                                      Adjacency
                                      IP address translation
                                      IP adjacency
                                      IP reachable address
                                      Reachable address

   The Routing module routes messages in the network and manages the message
   packet flow.  The Routing module components provide the following functions:

   o  Routing determines packet paths.  A path is the sequence of connected
      nodes and links between a source node and a destination node. The combined
      knowledge of all the network Routing layer modules of all the nodes in a
      network is used to determine the existence of a path, and route the packet
      to its destination.  The routing component at a routing node has the
      following specific functions:

      -  Extracts and interprets the route header in a packet.
      -  Performs packet forwarding based on the destination address.
      -  Performs packet fragmentation where necessary.
      -  Manages the characteristics of the path and if a node or link fails on
         a path, finds an alternate route.
      -  Interfaces with the Network Routing Subnetwork Dependent sublayer to
         receive reports concerning a circuit or node that has failed or the
         subsequent recovery of a circuit or node.
      -  Performs packet reassembly at the destination.
      -  Returns error reports to the source where necessary, for instance when
         the destination is unreachable or when the packet would have needed to
         be fragmented but segmentation permitted was not set in the packet.
         Segmentation permitted is always set in data packets generated by DNA
         nodes.  However, non-DNA nodes may do otherwise.

   o  Congestion control manages the resources used at each packet switching
      node each node that permits route-through.

   o  Packet lifetime control bounds the amount of time a packet can exist in
      the network.

   o  Initialization identifies the adjacent node and the adjacent node's
      network routing layer.  It also performs node verification, if required.

   o  Dynamic circuit management -- determines when to dial calls, when to hang
      up calls, and on dynamically assigned circuits which DTE address to dial.
      It exists only on dynamically established data links.

   Whether or not a particular attribute or event of a routing module entity is
   supported often depends on the type of node on which the routing module is
   operating. The description of an attribute or event indicates the type of
   node for which the attribute or event is supported, using the following key:

   L1    - The attribute is supported only for Level 1 routers.

   L2    - The attribute is supported only for Level 2 routers.

   L1,L2 - The attribute is supported only for Level 1 or Level 2 routers.

   End   - The attribute is supported only for end nodes.

   IP    - The attribute is supported only for systems that support dual Routing
           that is, both OSI and IP routing.

   All   - The attribute is supported by all implementations.

   The routing entity is the top-level entity in the Routing module hierarchy
   of entities.  The Routing module controls the operation of network routing
   within a node.

1  –  CHARACTER

     AREA AUTHENTICATION TYPE
         Support: L1,IP
         Default: None                      Value: None or Simple

         Type of authentication to be used for level 1 LSPs, PSNPs, and CSNPs.

     AUTONOMOUS SYSTEM NUMBER
         Support: IP
         Default: 0                          Value: 1-65535

         Autonomous system number of the local system. This characteristic is
         supported only if the value of the routing protocols supported
         characteristic includes EGP. You can modify this characteristic only
         when the status attribute routing state is off.

     DNA ADDRESS FORMAT
         Support: End
         Default: True                        Value: Boolean

         If true, specifies that NSAP addresses are DNA structured, and that
         NSAP address autoconfiguring is possible. If false, this specifies
         that NSAP addresses for this node are constructed from the
         characteristic manual network entity titles and the selectors
         supplied by the transport protocol module NSP and/or OSI transport.

     DOMAIN AUTHENTICATION TYPE
         Support: L2,IP
         Default: None                         Value: None or simple

         Type of authentication to be used for level 2 LSPs, PSNPs, and CSNPs.

     GENERATE CHECKSUMS
         Support: All
         Default: False                         Value: Boolean

         If true, specifies that checksums are generated for data, error
         report, and ES-IS PDUs initiated by this node. If false, these
         checksums are not generated. It is strongly recommended that, for
         performance reasons, you use the default value indicating no checksum
         generation.

     IP REASSEMBLY TIME
         Support: IP
         Default: 10                             Value: 1-255

         Maximum time, in seconds, for which IP fragments are held while
         awaiting reassembly.

     LIFETIME
         Support: All
         Default: 63                             Value: 2-255

         Value to be placed in the <quote>lifetime field of originating data
         packets. This value should be greater than the maximum number of hops
         in any path in the network, plus the maximum packet lifetime in
         half-seconds.

     MANUAL AREA ADDRESSES
         Support: L1,L2
         Default: No area address                 Value: Set of area addresses

         Area addresses to be used for this node.  An area address cannot be a
         Phase IV address or the address DefaultArea.  If the characteristic
         manual L1 algorithm has the  value routing vector, this set must
         be empty, and the characteristic phaseiv address must not be 0.0.  If
         the characteristic phaseiv address is 0.0, there must be at least one
         area address.

     MANUAL L1 ALGORITHM
         Support: L1
         Default: Routing Vector                   Value: see below

         Type of routing algorithm to be used within the area.  You can modify
         this characteristic only when the entity is disabled.

         link state     - The DECnet-Plus link-state algorithm is used.
         routing vector - The Phase IV routing-vector algorithm is used.

     MANUAL L2 ALGORITHM
         Support: L2
         Default: Routing Vector                  Value: see below

         Type of routing algorithm to be used at level 2.  You can modify this
         characteristic only when the entity is disabled.

         LINK STATE -     The DECnet-Plus link-state algorithm is used.

         ROUTING VECTOR - The Phase IV routing-vector algorithm is used.

     MANUAL NETWORK ENTITY TITLES
         Support: End
         Default: No NETS                         Value: set of NETS

         Network entity titles NETs to be used for this node.  If the
         characteristic dna address format is set to false, there must be
         at least one NET.

     MAXIMUM BUFFERS
         Default: 100                             Value: 1-65535

         Specifies the guaranteed number of buffers for forwarding.   More
         buffers may be used if they are available. You can only increase the
         characteristic value.

     MAXIMUM PATH SPLITS
         Support: L1,L2
         Default: 2                               Value: 1-32

         Maximum number of equal cost paths to split traffic between. You can
         modify this characteristic only when the entity is disabled.

     MINIMUM LSP TRANSMISSION INTERVAL
         Support: L1,L2

         Specifies the minimum interval in seconds between transmissions of
         an LSP from a particular source. When changed the timer must be  reset.

     PHASEIV ADDRESS
         Support: All
         Default 0.0                             Value: Phase IV address

         Specifies a Phase IV compatible address for communication with other
         Phase IV nodes. The default address, 0.0, indicates that no Phase IV
         compatible address is provided for the node. You can modify this
         characteristic only when the entity is disabled.

     PHASEIV AREA MAXIMUM COST
         Support: L2
         Default: 1022                           Value: 1-1022

         Maximum cost of a path to a reachable Phase IV area.  This
         characteristic is only used by the Phase IV routing algorithm that is,
         the routing-vector algorithm.

     PHASEIV AREA MAXIMUM HOPS
         Support: L2
         Default: 30                             Value: 1-30

         Maximum number of hops in a path to a reachable Phase IV area. This
         characteristic is only used by the Phase IV routing  algorithm that
         is, the routing-vector algorithm.

     PHASEIV BROADCAST ROUTING TIMER
         Support: L1,L2
         Default: 10                              Value: 1-65535

         Maximum interval, in seconds, between broadcast routing messages on
         broadcast circuits. This characteristic is only used by the Phase IV
         routing algorithm that is, the routing-vector algorithm.

     PHASEIV BUFFER SIZE
         Support: All
         Default: 576                             Value: 1-65535

         Size, in octets, of buffers used for routing to adjacent Phase IV
         nodes. This value is actually six octets greater than the maximum
         buffer size, and does not include the headers for the Routing and
         Data Link layers.

     PHASEIV MAXIMUM ADDRESS
         Support: L1,L2
         Default: 1023                           Value: 1-1023

         Maximum node number within the Phase IV area. This characteristic is
         only used by the Phase IV routing algorithm that is, the
         routing-vector algorithm.

     PHASEIV MAXIMUM AREA
         Support: L2
         Default: 63                              Value: 1-63

         Maximum Phase IV area number. This characteristic is only used by the
         Phase IV routing algorithm that is, the routing-vector algorithm.

     PHASEIV MAXIMUM COST
         Support: L1,L2
         Default: 1022                            Value: 1-1022

         Maximum cost of a path to a reachable node within the Phase IV area.
         This characteristic is only used by the Phase IV routing algorithm
         that is, the routing-vector algorithm.

     PHASEIV MAXIMUM HOPS
         Support: L1,L2
         Default: 30                              Value: 1-30

         Maximum number of hops in a path to a reachable node within the Phase
         IV area. This characteristic is only used by the Phase IV routing
         algorithm that is, the routing-vector algorithm.

     PHASEIV MAXIMUM VISITS
         Support: All
         Default: 63                              Value: 1-63

         Maximum number of visits that a packet can make to this node before
         Routing assumes that the packet is looping. This characteristic is only
         used by the Phase IV routing algorithm that is, the routing-vector
         algorithm.

     PHASEIV PREFIX
         Support: All
         Default: Hex 49                          Value: address prefix

         Prefix for Phase IV addresses. If the characteristic phaseiv address
         is not 0.0, a DECnet-Plus area address is formed by adding the area
         portion of the Phase IV address to this prefix. You can modify this
         characteristic only when the entity is disabled.

     PROBE RATE
         Support: End
         Default: 20                              Value: 1-65535

         Number of packets after which a probe is sent.  This characteristic is
         used only on multilink end systems, on circuits without cache entries
         for the destination.

     PROTOCOLS
         Support: IP
         Default:                                 Value: IP or ISO8473

         The protocol stacks that are enabled on this system. These can be
         either or both of the above values. The value of this characteristic
         derives from an argument to the create command. You cannot modify
         this characteristic.

     REDIRECT HOLDING TIME
         Support: L1,L2
         Default: 600                             Value: 1-65535

         Holding time, in seconds, to be specified in Redirect PDUs generated
         by this node.

     RIP RECEIVE METRIC CLASS
         Support: L2,IP
         Default: External                        Value: External or Internal

         The class to be associated with routes received through RIP. This
         value may be overridden by a routing receive route entity. This
         characteristic is supported only if the routing protocols supported
         characteristic includes the RIP routing protocol.

     RIP SEND LOCAL METRIC
         Support: L2,IP
         Default: 1                              Value: 0-16

         The metric value used by RIP when announcing routes derived from local
         information. This value is used unless it is overridden by a routing
         send route entity. This characteristic is supported only if the
         routing protocols supported characteristic includes the RIP routing
         protocol.

     RIP SEND METRIC CLASSES
         Support: L2,IP
         Default: Internal                      Value: set of external, internal

         Routes received through routing protocols other than RIP with metric
         classes in this set are candidates for announcement in RIP messages
         subject to the route propagation policy in force. Routes with metric
         classes not in this set will not be announced.  Each value in this set
         may be overridden separately by a more specific propagation policy
         specified by a routing send route or routing send route route
         source entity. This characteristic is supported only if the routing
         protocols supported characteristic includes the RIP routing protocol.

     RIP SEND REPLACEMENT METRIC
         Support: L2,IP
         Default: 1                           Value: 0-16

         The metric value used by RIP when announcing routes derived through
         other routing protocols. This value is used unless it is overridden by
         a routing send route entity. This characteristic is supported only
         if the routing protocols supported characteristic includes the RIP
         routing protocol.

     ROUTE PROPAGATION
         Support: L2,IP
         Default: No Route Propagation         Value: set of protocol pairs

         The default route propagation to be performed. The set may include
         the following protocol pairs:

         EGP to IS-IS      IS-IS to RIP
         EGP to RIP        RIP   to EGP
         IS-IS to EGP

         If a particular value is not present in the set, routes are not
         propagated between those two protocols in that direction. This
         characteristic is supported only if the routing protocols supported
         characteristic includes either of the EGP or RIP routing protocols.

     ROUTING PROTOCOLS SUPPORTED
         Support: L2,IP

         The set of routing protocols supported by this implementation. You
         cannot modify this characteristic.

         EGP
         IS-IS
         RIP

     SEGMENT BUFFER SIZE
         Support: All
         Default: 570                           Value: 0-65535

         Maximum segment size, in octets, to be used by the Transport layer. A
         value of zero means that the segment size is unlimited.

     SEND SOURCE QUENCH
         Support: L1,L2,IP
         Default: False                         Value: Boolean

         Specifies whether an ICMP source quench packet is sent when an IP
         packet is discarded because of congestion. If false, ICMP source
         quench packets are never sent.

     SOURCE QUENCH INTERVAL
         Support: L1,L2,IP
         Default: 100                           Value: 1-65535

         Minimum time, in milliseconds, between transmission of successive
         ICMP source quench packets.

     SUMMARY ADDRESSES
         Support: L2,IP
         Default: No address                     Value: Set of summary addresses

         Summary address information to be included in level 2 link state
         packets sent by this node.

     TIME TO LIVE
         Support: IP
         Default: 35                             Value: 1-255

         Specifies the value to be placed in the time to live field of
         originating IP packets. This value should be greater than the maximum
         number of hops in any path on the network.

     TYPE
         Support: All
         Default: No default                     Value: see below

         Routing type of this node. You cannot modify this characteristic.

         ENDNODE  - The node is an end node.

         L1router - The node is a level 1 router.

         L2router - The node is a level 2 router.

     VERSION

         Version number of the DNA Network Routing layer architecture
         specification to which this implementation conforms. You cannot modify
         this characteristic.

2  –  counters

     ADDRESS UNREACHABLE PDUS DISCARDED
         Support: All

         Number of data PDUs that have been discarded because the destination
         was unreachable.

     AGED IP PACKETS DISCARDED
         Support: IP

         Number of IP packets that have been discarded because their time of
         life has expired.

     AGED PDUS DISCARDED
         Support: L1,L2

         Number of data PDUs that have been discarded because their lifetime
         has expired.

     ATTEMPTS TO EXCEED MAXIMUM SEQUENCE NUMBER
         Support: L1,L2

         Number of times an attempt was made to increase the sequence number of
         a link state packet beyond the maximum allowed.

     CORRUPTED LSPS DETECTED
         Support: L1,L2

         Number of times that the corrupted lsp detected event has been
         generated.

     ERROR REPORTS GENERATED
         Support: All

         Number of error report PDUs or Phase IV data packets with RTS set
         that have been generated.

     ICMP ADDRESS MASK REPLY MESSAGES RECEIVED
         Support: IP

         Number of ICMP Address Mask Reply messages received.

     ICMP ADDRESS MASK REPLY MESSAGES SENT
         Support: IP

         Number of ICMP Address Mask Reply messages sent.

     ICMP ADDRESS MASK REQUEST MESSAGES RECEIVED
         Support: IP

         Number of ICMP Address Mask Request messages received.

     ICMP ADDRESS MASK REQUEST MESSAGES SENT
         Support: IP

         Number of ICMP Address Mask Request messages sent.

     ICMP DESTINATION UNREACHABLE MESSAGES RECEIVED
         Support: IP

         Number of ICMP Destination Unreachable messages received.

     ICMP DESTINATION UNREACHABLE MESSAGES SENT
         Support: IP

         Number of ICMP Destination Unreachable messages sent.

     ICMP ECHO REPLY MESSAGES RECEIVED
         Support: IP

         Number of ICMP Echo Reply messages received.

     ICMP ECHO REPLY MESSAGES SENT
         Support: IP

         Number of ICMP Echo Reply messages sent.

     ICMP ECHO REQUEST MESSAGES RECEIVED
         Support: IP

         Number of ICMP Echo Request messages received.

     ICMP ECHO REQUEST MESSAGES SENT
         Support: IP

         Number of ICMP Echo Request messages sent.

     ICMP MESSAGE SEND ERRORS
         Support: IP

         Number of ICMP messages that could not be sent because of problems in
         the ICMP layer.  Note that this value does not include errors that
         occur outside the ICMP layer, such as forwarding errors.

     ICMP MESSAGES RECEIVED
         Support: IP

         Number of ICMP messages received. This value includes those messages
         counted by the icmp received message errors counter.

     ICMP MESSAGES SENT
         Support: IP

         Number of ICMP messages of all types that the node has attempted to
         send. Note that this figure includes the value of the  icmp message
         send errors counter.

     ICMP PARAMETER PROBLEM MESSAGES RECEIVED
         Support: IP

         Number of ICMP Parameter Problem messages received.

     ICMP PARAMETER PROBLEM MESSAGES SENT
         Support: IP

         Number of ICMP Parameter Problem messages sent.

     ICMP RECEIVED MESSAGE ERRORS
         Support: IP

         Number of ICMP messages received with any type of error.

     ICMP REDIRECT MESSAGES RECEIVED
         Support: IP

         Number of ICMP Redirect messages received.

     ICMP REDIRECT MESSAGES SENT
         Support: IP

         Number of ICMP Redirect messages sent.

     ICMP SOURCE QUENCH MESSAGES RECEIVED
         Support: IP

         Number of ICMP Source Quench messages received.

     ICMP SOURCE QUENCH MESSAGES SENT
         Support: IP

         Number of ICMP Source Quench messages sent.

     ICMP TIME EXCEEDED MESSAGES RECEIVED
         Support: IP

         Number of ICMP Time Exceeded messages received.

     ICMP TIME EXCEEDED MESSAGES SENT
         Support: IP

         Number of ICMP Time Exceeded messages sent.

     ICMP TIMESTAMP REPLY MESSAGES RECEIVED
         Support: IP

         Number of ICMP Timestamp Reply messages received.

     ICMP TIMESTAMP REPLY MESSAGES SENT
         Support: IP

         Number of ICMP Timestamp Reply messages sent.

     ICMP TIMESTAMP REQUEST MESSAGES RECEIVED
         Support: IP

         Number of ICMP Timestamp Request messages received.

     ICMP TIMESTAMP REQUEST MESSAGES SENT
         Support: IP

         Number of ICMP Timestamp Request messages sent.

     ICMP UNKNOWN MESSAGE TYPES RECEIVED
         Support: IP

         Number of ICMP messages received with an unknown message type.

     IP ADDRESS UNREACHABLE PACKETS DISCARDED
         Support: IP

         Number of IP packets discarded because their destination was
         unreachable.

     IP DESTINATION ADDRESS ERROR PACKETS DISCARDED
         Support: IP

         Number of IP packets discarded because of an invalid destination
         address or the address of an unsupported class.

     IP PACKET FORMAT ERRORS
         Support: IP

         Number of IP packets discarded because of a format error in the IP
         header.

     IP PACKETS DISCARDED
         Support: IP

         Number of IP packets discarded for either of the following reasons:

        o  Error in the IP header, such as bad checksum or version number
           mismatch. Note, however, that format errors and time to live expired
           are excluded.

        o  Packet received through data link broadcast when forwarding is not
           allowed.

     IP PROTOCOL UNREACHABLE PACKETS DISCARDED
         Support: IP

         Number of IP packets received for the local system and discarded
         because there was no port with the protocol type specified in the IP
         datagram PROTO field.

     IP SOURCE ADDRESS ERROR PACKETS DISCARDED
         Support: IP

         Number of IP packets discarded because of an invalid source address or
         the address of an unsupported class.

     LSP l1 DATABASE OVERLOADS
         Support: L1,L2

         Number of times that the lsp level 1 database overload event has
         been generated.

     LSP l2 DATABASE OVERLOADS
         Support: L2

         Number of times that the lsp level 2 database overload event has
         been generated.

     MANUAL ADDRESSES DROPPED FROM AREA
         Support: L1,L2

         Number of times an address in the  manual area addresses set is
         ignored when computing an area address. Each address that is ignored
         is counted separately.

     OWN LSP PURGES
         Support: L1,L2

         Number of times that the own lsp purged event has been generated.

     PDU FORMAT ERRORS
         Support: All

         Number of data PDUs that have been discarded because of format errors.

     PHASEIV TRANSLATION FAILURES
         Support: All

         Number of times the phaseiv translation failures event has been
         generated.

     SEQUENCE NUMBER SKIPS
         Support: L1,L2

         Number of times that the sequence number skipped event has been
         generated.

     UNSUPPORTED OPTIONS
         Support: All

         Number of data PDUs that have been discarded because they specified
         unsupported options in their header.

3  –  preset_attrib

   Preset attributes are similar to characteristics, in that their values
   control the way in which the routing module operates. However, unlike
   characteristics, you cannot alter preset attribute values using the set
   command.

     BROADCAST LSP TRANSMISSION INTERVAL
         Support: L1,L2

         Interval, in milliseconds, between the transmission of Link State
         Packets LSPs on a broadcast circuit.

     COMPLETE SNP INTERVAL
         Support: L1,L2

         Interval, in seconds, between generation of Complete Sequence Number
         Packets SNPs by a designated router on a broadcast circuit.

     DEFAULT ESHELLO TIMER
         Support: All

         Value to be used for the current suggested Hello timer, in the absence
         of any suggested value from the intermediate system IS. On routers,
         this is the value to be suggested when the router is not required to
         poll the ES configuration.  In routers, this value is suggested by the
         Suggested ES Configuration Timer option in IS Hellos.

     DR ISISHELLO TIMER
         Support: L1,L2

         Interval, in seconds, between the generation of IS-IS Hello PDUs by
         the designated router.

     ES CACHE HOLDING TIME
         Support: End

         Holding time, in seconds, for an entry in the node's end-node cache
         database.

     ES CACHE WIDTH
         Support: End

         Maximum number of LAN address entries in the node's end-node cache
         database on a broadcast circuit.

     HOLDING MULTIPLIER
         Support: All

         Value by which to multiply the Hello timer to obtain the holding timer
         value for ES and IS Hellos and for point-to-point, router-to-router
         Hellos.

     INACTIVE SELECTOR
         Support: All

         This is the selector value identifying the port to which incoming
         Inactive Subset PDUs are to be sent.

     INITIALIZATION TIMER
         Support: All

         Delay, in seconds, between initialization of a data link and sending a
         DECnet-Plus message on a DDCMP circuit.

     ISIS FORMAT
         Support: L1,L2

         This attribute controls the protocol identification to be used for
         "DNA Private" PDUs.  On broadcast circuits, this characteristic also
         controls the SAP on which they are transmitted.

     ISIS HOLDING MULTIPLIER
         Support: L1,L2

         Value by which to multiply the ISIS Hello timer to obtain the value of
         the holding timer for LAN level 1 and level 2 router-to-router Hellos.

     MAXIMUM AGE
         Support: L1,L2

         Number of seconds before an LSP is considered to be expired.

     MAXIMUM LSP GENERATION INTERVAL
         Support: L1,L2

         Maximum interval, in seconds, between link state packets LSPs
         generated by this node.

     MINIMUM LSP GENERATION INTERVAL
         Support: L1,L2

         Minimum time, in seconds, between generation of  LSPs by this node.

     MINIMUM LSP TRANSMISSION INTERVAL
         Support: L1,L2

         Minimum interval, in seconds, between retransmissions of an LSP.

     MULTICIRCUIT ESHELLO TIMER
         Support: End

         Value to be used for the current suggested Hello timer on a
         multicircuit end node with more than one circuit enabled, in the
         absence of any suggested values from the IS.

     ORIGINATING l1 LSP BUFFER SIZE
         Support: L1,L2

         Maximum size of level 1 LSPs and SNPs originated at this node.

     ORIGINATING l2 LSP BUFFER SIZE
         Support: L2

         Maximum size of level 2 LSPs and SNPs originated at this node.

     PARTIAL SNP INTERVAL
         Support: L1,L2

         Minimum interval, in seconds, between sending partial SNPs.

     POLL ESHELLO RATE
         Support: All

         Interval, in seconds, between ES Hellos when a router requires to poll
         the ES configuration.

     QUEUE THRESHOLD
         Support: L1,L2

         Average queue length at a router, above which the "congestion
         experienced" bit will be set in a forwarded data PDU.

     WAITING TIME
         Support: L1,L2

         Delay, in seconds, between routing databases being in the waiting
         state and entering the on state.

     ZERO AGE LIFETIME
         Support: L1,L2

         Time, in seconds, for which the purge header of an expired LSP is
         retained.

4  –  status

     AREA ADDRESSES
         Support: All

         A set of area addresses. If the node is an end node, these are the
         area address portions of the NETs of all adjacent routers. If the
         node is a  level 1 or level 2 router, this set is the union of the
         sets of manual area addresses reported in all level 1 LSPs received by
         this router.

     EGP PORT
         Support: IP

         Name of the routing port entity used for sending and receiving EGP
         messages.  This attribute is set when a routing egp group entity is
         enabled.

     ICMP PORT
         Support: IP

         Name of the routing port entity used for sending and receiving ICMP
         messages. This attribute is set when the routing module is enabled
         and the protocols characteristic includes the value IP.

     L1 STATE
         Support: L1,L2

         State of the level 1 database.

          OFF -     Routing is disabled.

          ON -      Routing is enabled and operating correctly.

          WAITING - Routing has received routing information that it cannot
                    store and is waiting for the overload to be removed.

     L2 STATE
         Support: L2

         State of the level 2 database.

         OFF -     Routing is disabled.

         ON -      Routing is enabled and operating correctly.

         WAITING - Routing has received routing information that it cannot
                   store and is waiting for the overload to be removed.

     NEAREST L2 ROUTER ADJACENCIES
         Support: L1,L2

         Names of adjacencies to be used for forwarding to the nearest level 2
         router.  If the node is a level 2 router adjacent to other areas, or
         if it is a level 1 router in an area with no attached level 2 routers,
         this set is empty.

     RIP PORT
         Support: IP

         Name of the udp port entity used by the routing module for sending
         and receiving RIP messages. This attribute is set when a routing
         circuit entity is enabled with its rip state characteristic set to
         any value other than off.

     STATE
         Support: All

         State of the routing entity.

         OFF - The entity is disabled.

         ON  - The entity is enabled.

5  –  circuit

   A routing circuit entity represents a data link to another node.

5.1  –  character

     ALTERNATIVE SUBNET ADDRESSES
         Support: L1,L2,IP
         Default: No Address                   Value: Set of subnet_address

         A set of alternative IP addresses and subnet masks for this interface.
         You can modify this characteristic only when the entity is disabled.

     ARP HOLDING TIME
         Support: IP
         Default: 600                          Value: 30-65535

         Number of seconds to hold on to a routing circuit ip address
         translation entity. This characteristic is supported only if the
         circuit's type characteristic is CSMA-CD.

     ARP RESPONSE WAITING TIME
         Support: IP
         Default: 3                            Value: 1-10

         Number of seconds to wait for an ARP response when an ARP request has
         been sent. This characteristic is supported only if the circuit's
         type characteristic is CSMA-CD.

     AUTHENTICATION TYPE
         Support: L1,L2,IP
         Default: None                         Value: None or Simple

         Type of authentication to be used for LAN L1 Hellos, LAN L2 Hellos,
         or PtPt Hellos on this circuit.

     DATA LINK ENTITY
         Support: All
         Default: NO Data Link name            Value: Local_entity-name

         Name of the entity within the data link module to be created when a
         port is opened for that data link type. You can modify this
         characteristic only when the entity is disabled.  This attribute is
         supported for all types of circuits; however, for X.25 circuits set
         the attribute to x25 access.

     DIRECTED BROADCAST
         Support: L1,IP
         Default: On                           Value: Off or On

         Specifies how an IP packet is to be forwarded on a broadcast link.

         OFF - Discard the packet silently.

         ON  - Broadcast the packet using data level link broa that either of
               the following conditions is true:

               o  The packet's subnet address matches the value of the subnet
                  address characteristic.

               o  The packet's subnet address matches one of the values of the
                  alternative subnet addresses characteristic.

        This characteristic is supported only if the characteristic type is
        set to CSMA-CD.

     DNA NEIGHBOR
         Support: L1,L2
         Default: True                         Value: Boolean

         If true, specifies that the neighbor is expected to be DNA
         compliant, and so proprietary mechanisms are possible. If false, no
         router-to-router Hellos or LSPs will be sent over  this circuit. This
         characteristic is supported only if the characteristic type is not
         x25 da. You can modify this  characteristic only when the entity is
         disabled.

     ENABLE PHASEIV ADDRESS
         Support: All
         Default: True                          Value: Boolean

         Specifies whether the physical LAN address is to be set to the Phase IV
         style LAN address that is, AA-00-04-00-xx-xx. The LAN address is
         set only if this attribute is true and the value of the phaseiv
         address characteristic is not 0.0.  If phaseiv address is not 0.0
         and there are multiple adaptors to the same LAN, only one circuit may
         have this attribute set to true. This characteristic is supported
         only if the characteristic type is set to CSMA-CD.

     EXPLICIT RECEIVE VERIFICATION
         Support: All
         Default: True                           Value: Boolean

         Type of password verification performed at circuit initialization. If
         true, the received verifier is checked against the value of the
         characteristic receive verifier for this circuit, if any. If false,
         the received verifier is checked against the set of verifiers specified
         in the routing permitted neighbor entities. This attribute is
         supported only if the characteristic type is set to ddcmp, hdlc,
         x25 static incoming, x25 static outgoing, and x25 permanent.

     HELLO TIMER
         Support: L1,L2
         Default: 10                             Value: 1-32767

         Interval, in seconds, between IS Hello messages.

     IDLE TIMER
         Support: All
         Default: 10                             Value: 1-32767

         Number of seconds of idle time before a call is cleared. This attribute
         is supported only if the characteristic type is x25 da.

     INACTIVE AREA ADDRESS
         Support: All
         Default: No area Address                Value: Set of area address

         Area address associated with the use of the inactive subnet of ISO
         8473.  Maximum area address that may be present is 1. This
         characterisitic is supported only if the characteristic type is set
         to csma-cd.

     INITIAL MINIMUM TIMER
         Support: All
         Default: 55                             Value: 1-65535

         Period, in seconds, for which an X.25 call remains connected after
         being established, irrespective of traffic. This should be set small
         enough that the call is cleared before the start of the next charging
         interval. This attribute is supported only if the characteristic type
         is x25 da.

     ISIS HELLO TIMER
         Support: L1,L2
         Default: 3                              Value: 1-32767

         Interval, in seconds, between LAN level 1 and level 2 router-to-router
         Hello messages. This value is also used as the interval between IS
         Hello messages when polling the ES configuration.

     L1 COST
         Support: L1,L2
         Default: 20                             Value: 1-63

         Cost of this circuit for level 1 traffic.

     L1 router priority
         Support: L1,L2
         Default: 64                             Value: 1-127

         Priority for becoming LAN level 1 designated router. This attribute is
         supported only if the circuit's characteristic type is csma-cd.

     L2 cost
         Support: L2
         Default: 20                             Value: 1-63

         Cost of this circuit for level 2 traffic.

     L2 router priority
         Support: L2
         Default: 64                             Value: 1-127

         Priority for becoming LAN level 2 designated router. This attribute is
         supported only if the circuit's characteristic  type is csma-cd.

     MANUAL DATA LINK SDU SIZE
         Support: All
         Default: 1492                           Value: 128-65535

         Preferred maximum data-link block size, in octets. You can modify this
         characteristic only when the entity is disabled. If the characteristic
         type is CSMA-CD, this characteristic is a read-only attribute whose
         value is fixed at 1492.

     MANUAL DATA LINK SDU SIZE FOR IP
         Support: IP
         Default: see below                      Value: 128-65535

         Preferred maximum DSDU size, in octets, for the transmission of IP
         packets.  The DSDU size includes the size of the packet containing the
         IP header.  On point-to-point HDLC links, the DSDU size also includes
         the 1-octet link encapsulation that is, the maximum IP packet size is
         the value of this attribute minus 1. The default value depends on the
         circuit type, as follows:

         CSMA-CD - 1500
         DDCMP   - 1500
         HDLC    - 1500
         X.25 all types - 576

        You can modify this characteristic only when the entity is disabled.

     MANUAL l2ONLY MODE
         Support: L2
         Default: False                          Value: Boolean

         If true, specifies that this circuit is to be used only for level 2
         traffic. If false, the circuit may be used for both level 1 and
         level 2 traffic. You can modify this characteristic only when the
         entity is disabled.

     MANUAL ROUTERS
         Support: End
         Default: No router IDs                   Value: Set of LAN Address

         Manually entered IDs of routers.  If this set is empty, the circuit
         will auto-configure the routers. This characteristic is supported only
         if the circuit's characteristic  type is CSMA-CD.

     MAXIMUM ARP RETRIES
         Support: IP
         Default: 3                              Value: 1-10

         Maximum number of times that an ARP request can be sent for the same
         IP address. This characteristic is supported only if the circuit's
         characteristic type is set to CSMA-CD.

     MAXIMUM CALL ATTEMPTS
         Support: All
         Default: 10                             Value: 0-255

         Maximum number of successive X.25 call failures before the circuit is
         regarded as being halted. A value of zero means that there is no limit
         to the number of retries. This attribute is supported only if the
         characteristic type  is set to x25 static outgoing. You can modify
         this characteristic only when the entity is disabled. Also, you can
         only increase the characteristic value.

     MAXIMUM SVC ADJACENCIES
         Support: All
         Default: 1                              Value: 1-65535

         Number of routing circuit adjacency entities to reserve for SVCs on
         this circuit.  This is effectively the maximum number of simultaneous
         calls possible on this circuit. This attribute is supported only if
         the characteristic type is X25 DA.

     ORIGINATING QUEUE LIMIT
         Support: L1,L2
         Default: 2                              Value: 1-50

         Maximum number of data PDUs originated by this node that can be on this
         circuit's transmit queue.  This should be set to the minimum number
         required to keep the data link from idling. You can modify this
         characteristic to a higher value when the entity is disabled; you can
         never modify it to a lower value.

     RECALL TIMER
         Support: All
         Default: 60                             Value: 0-65535

         Interval, in seconds, that must elapse between a call failure and a
         recall.  This attribute is supported only if the characteristic type
         is set to X25 static outgoing, X25 DA, HDLC, or DDCMP.

     RESERVE TIMER
         Support: All
         Default: 600                            Value: 1-65535

         Interval, in seconds, during which the SVC remains reserved for the
         previous DTE address after a call is cleared due to lack of traffic.
         This attribute is supported only if the characteristic type is
         x25 da.

     RESERVED ADJACENCY
         Support: End
         Default: False                           Value: Boolean

         If true, specifies that one SVC must be reserved for connection to a
         router. If false, no  SVC needs to be reserved for this purpose. This
         characteristic is supported only if the circuit's characteristic
         type is  x25 da.  You can modify this characteristic only when the
         entity is disabled.

     RIP GENERATED DEFAULT ROUTE
         Support: L1,L2,IP
         Default: False                           Value Boolean

         If true, this specifies that the default route is announced in RIP
         messages sent on this circuit, with the metric value  specified in the
         RIP generated default route metric characteristic. If false, the
         default route is not generated.

     RIP GENERATED DEFAULT ROUTE METRIC
         Support: L1,L2,IP
         Default: False                          Value: Boolean

         The metric to be used when announcing a generated default route through
         RIP on this circuit.

     RIP NEIGHBORS
         Support: L2,IP
         Default: No address                      Value: set of IP-addresses

         IP addresses of neighboring systems with which RIP will be exchanged
         on this circuit. If the circuit is a point-to-point circuit, this set
         must contain a single IP address if the rip state characteristic is
         to be set to  send and receive. Also, you must disable the entity
         before altering this characteristic. If the rip send type
         characteristic is set to  broadcast, only RIP messages from addresses
         specified in this set will be received; other messages will be silently
         discarded. This characteristic is supported only if the  routing
         protocols supported characteristic of the routing entity includes
         the RIP routing protocol.

     RIP POISONED REVERSE
         Support: L2,IP
         Default: True                            Value: Boolean

         Specifies whether poisoned reverse routes are to be sent in RIP
         messages on this circuit. If false, poisoned reverse routes  are not
         sent. This characteristic is supported only if the routing protocols
         supported characteristic of the routing entity includes the RIP
         routing protocol.

     RIP RECEIVE DEFAULT ROUTE
         Support: L2,IP
         Default: True                            Value: Boolean

         Specifies whether the default route is accepted from RIP messages on
         this circuit. If false, the default route from RIP messages on this
         circuit is discarded. This characteristic is supported only if the
         routing protocols supported characteristic of the routing entity
         includes the RIP routing protocol.

     RIP SEND TYPE
         Support: L2,IP
         Default: Broadcast                  Value: Broadcast or point-to-point

         Specifies how RIP messages are sent on this circuit.

         BROADCAST -      RIP messages are sent by means of data link broadcast.

         POINT-TO-POINT - RIP messages are sent directly to each IP address
                          specified in the rip neighbors characteristic.

        This characteristic is supported only if the routing protocols
        supported characteristic of the routing entity includes the RIP
        routing protocol and if the circuit's type characteristic is csma-cd.

     RIP STATE
         Support: L2,IP
         Default: Off                           Value: see below

         Specifies how RIP messages are treated on this circuit.

         OFF -              RIP messages cannot be sent or received on this
                            circuit.

         RECEIVE -          RIP messages can be received but not sent on this
                            circuit.

         SEND AND RECEIVE - RIP messages can be sent and received on this
                            circuit.

        This characteristic is supported only if the routing protocols
        supported characteristic of the routing entity includes the RIP
        routing protocol.

     SUBNET ADDRESS
         Support: IP
         Default: 0.0.0.0                     Value: Subnet Address

         IP address and subnet mask of this interface.  You can modify this
         characteristic only when the entity is disabled.

     TEMPLATE
         Support: All
         Default: No template name             Value: Template-id

         Name of the template to be used when a port is opened for this
         data-link type.  If no template name is specified, no template is used.
         You can modify this characteristic only when the entity is disabled.

     TRANSMIT VERIFIER
         Support: All
         Default: No verifier                  Value: Hex-string, length 0-38

         Value to be transmitted for verifying the identity of this node. If
         no verifier is specified, no verifier is transmitted. This
         characteristic is supported only if the characteristic type is
         either ddcmp, hdlc,  x25 static outgoing, x25 static incoming, or
         x25 permanent. You cannot display this characteristic.

     TYPE
         Support: All
         Default: All

         Type of circuit. You cannot modify this characteristic. This
         characteristic is set by means of an argument to the create command.

         CSMA-CD -             The circuit is a broadcast circuit.

         DDCMP -               The circuit is a DDCMP circuit.

         HDLC -                The circuit is an HDLC circuit.

         X25 DA -              The circuit is a dynamically allocated X.25
                               circuit.

         X25 PERMANENT -       X.25 permanent virtual circuit.

         X25 STATIC INCOMING - Static incoming X.25 circuit.

         X25 STATIC OUTGOING - Static outgoing X.25 circuit.

     X.25 FILTERS
         Default: seee below                       Value: set of simple names

         Specifies the set of X.25 filters to be used when a port is opened to
         the X.25 module.  Typically, there will be two sets: one to specify the
         selection on the Call User Data field for DECnet-Plus, and the other to
         specify the selection on the subaddress for Phase IV. This attribute is
         valid only if the characteristic type is x25 static incoming or x25
         da.

5.2  –  counters

     AUTHENTICATION FAILURES
         Support: L1,L2,IP

         Number of times a PDU has been received on this circuit with an
         Authentication Information field that is incompatible with the PDU type.

     CALLS FAILED
         Support: All

         Number of unsuccessful call attempts on this circuit. This attribute is
         supported only if the characteristic type is x25 da.

     CALLS PLACED
         Support: All

         Number of call attempts successful and unsuccessful on this circuit.
         This attribute is supported only if the characteristic type is
         x25 da.

     CHANGES IN ADJACENCY STATE
         Support: All

         Number of times the status attribute state of an adjacency belonging
         to this circuit changes from Up to Down or Initializing, or the
         reverse.

     CHANGES IN IP ADJACENCY STATE
         Support: IP

         Number of times the status attribute state of an IP adjacency
         belonging to this circuit changes from Up to some other state, or the
         reverse.

     CHANGES IN RIP NEIGHBOR STATE
         Support: L2,IP

         Number of times the RIP state of IP adjacencies belonging to this
         circuit have changed. This attribute is supported only if the routing
         entity's  characteristic routing protocols supported includes the
         routing protocol RIP.

     CIRCUIT CHANGES
         Support: All

         Number of times that the status attribute state has changed from on
         to off, or vice versa.

     CONGESTION DISCARDS
         Support: L1,L2

         Number of data-and error-report NPDUs that have been discarded, before
         or after fragmentation, because of congestion. Any other discarding
         will already have been done by the forwarding process. This number
         includes all PDUs recognized by the receive process as data PDUs
         DECnet-Plus data- and error-report PDUs and Phase IV data packets,
         even though they may subsequently be discarded for some reason.

     CONTROL PDUS RECEIVED
         Support: All

         Number of control PDUs that have been received on this circuit. This
         number includes all Network layer PDUs, with the exception of
         DECnet-Plus data and error report PDUs and Phase IV data PDUs.

     CONTROL PDUS SENT
         Support: All

         Number of control PDUs that have been sent on this circuit.

     CORRUPTED HELLO PDUS RECEIVED
         Support: All

         Number of times an ES-IS end system to intermediate system or IS-IS
         intermediate system to intermediate system Hello PDU has been
         received on this circuit that either cannot be parsed or contains an
         incorrect checksum.

     CORRUPTED LSPS RECEIVED
         Support: L1,L2

         Number of times a corrupted link state packet has been received on this
         circuit.

     DA ADJACENCY CHANGES
         Support: All

         Number of DA adjacency change events that have been generated.

     DATA PDUS FORWARDED
         Support: L1,L2

         Number of data- and error-report NPDUs that have been forwarded onto
         this circuit either from another circuit or from a local port. This
         number includes all PDUs recognized by the receive process as data
         PDUs DECnet-Plus data- and error-report PDUs and Phase IV data packets,
         even though they may subsequently be discarded for some reason.

     DATA PDUS FRAGMENTED
         Support: All

         Number of data NPDUs that have been fragmented on this circuit.

     DATA PDUS RECEIVED
         Support: All

         Number of data- and error-report NPDUs that have been received on this
         circuit. This number includes all PDUs recognized by the  receive
         process as data PDUs DECnet-Plus data and error report PDUs and Phase
         IV data packets, even though they may subsequently be discarded for
         some reason.

     DATA PDUS TRANSMITTED
         Support: All

         Number of data- and error-report NPDUs, after fragmentation, that have
         been delivered to the port for transmission on this circuit.  This
         number includes all PDUs recognized by the receive process as data PDUs
         DECnet-Plus data- and error-report PDUs and Phase IV data packets,
         even though they may subsequently be discarded for some reason.

     EXCEEDED MAXIMUM SVC ADJACENCIES
         Support: End,L2

         Number of exceeded maximum svc adjacency events that have been
         generated. This counter is supported only if the circuit's type is
         set  to x25 da; only for nodes that are end nodes; and if the system
         supports dual routing both DECnet and IP routing.

     ID REACHABILITY CHANGES
         Support: All

         Number of ID reachability change events that have been generated.

     INITIALIZATION FAILURES
         Support: All

         Number of times that an attempt to initialize an adjacent node over
         this circuit has failed, either because of version skew or area
         mismatch.

     IP FRAGMENTATION FAILURE DISCARDS
         Support: IP

         Number of IP packets discarded because fragmentation was required to
         transmit them, but the IP header requested "do not fragment."

     IP FRAGMENTS CREATED
         Support: IP

         Number of IP fragments created for transmission on this circuit.

     IP PACKETS FORWARDED
         Support: IP

         Number of IP packets forwarded on this circuit before fragmentation.
         These IP packets may be from another circuit or from a local  port.
         Note that this value includes those IP packets counted in the  ip
         send discards counter.

     IP PACKETS FRAGMENTED
         Support: IP

         Number of IP packets that have been fragmented on this circuit.

     IP PACKETS RECEIVED
         Support: IP

         Number of IP packets received on this circuit. This value includes all
         types of IP packet control, data, etc., and those that may
         subsequently be discarded for any reason.

     IP RECEIVED DISCARDS
         Support: IP

         Number of IP packets that have been received and then discarded because
         of congestion.

     IP SEND DISCARDS
         Support: IP

         Number of IP packets for transmission that have been discarded because
         of congestion.

     IRRECOVERABLE SVC FAILURES
         Support: All

         Number of times that the number of re-call attempts on this circuit
         has become equal to the value of the characteristic maximum call
         attempts. This attribute is supported only if  the characteristic
         type is set to x25 static outgoing.

     LAN L1 DESIGNATED ROUTER CHANGES
         Support: L1,L2

         Number of times the local node has either elected itself or resigned
         as the LAN level 1 designated router on this circuit. This attribute
         is supported only if the circuit's characteristic  type is set to
         csma-cd.

     LAN L2 DESIGNATED ROUTER CHANGES
         Support: L2

         Number of times the local node has either elected itself or resigned
         as the LAN level 2 designated router on this circuit.

     LAN PHASEIV DESIGNATED ROUTER CHANGES
         Support: L1,L2

         Number of times the local node has either elected itself or resigned as
         the LAN Phase IV designated router on this circuit.

     REDIRECT DISCARDS
         Support: End

         Number of Redirect PDUs that have been discarded because of
         insufficient cache memory.

     REJECTED ADJACENCIES
         Support: All

         Number of times an attempt to create a new adjacency using this
         circuit has failed because of insufficient resources.

     REJECTED IP ADJACENCIES
         Support: L2,IP

         Number of times an attempt to automatically create a new IP adjacency
         to an IP router has failed because of lack of resources.

     RIP ERRORS RECEIVED
         Support: L2,IP

         Number of RIP messages received with any kind of received error on this
         circuit. This attribute is supported only if the  routing entity's
         characteristic routing protocols supported includes the routing
         protocol RIP.

     SEGMENTATION FAILURE DISCARDS
         Support: L1,L2

         Number of data NPDUs that have been discarded because segmentation was
         required to send them on this circuit but was not permitted in the
         NPDU header.

     VERIFICATION REJECT EVENTS

         Number of verification reject events that have been generated. This
         attribute is supported only if the characteristic type is set to
         DDCMP, HDLC, X25 static incoming, X25 static outgoing, or X25
         permanent.

5.3  –  status

     DATA LINK PORT
         Support: All

         Name of the data link port used for this circuit.  Not supported on
         DA circuits.

     DATA LINK SDU SIZE
         Support: All

         Maximum size, in octets, of a Data Link SDU for this circuit. This
         includes the Network layer header, but excludes the Data Link layer
         header. The value of this status is the lesser of the value of the
         characteristic manual data link sdu size and any limit  imposed by
         the Data Link layer.

     LAN L1 ID
         Support: L1,L2

         LAN ID allocated by the LAN level 1 designated router. This attribute
         is supported only if the circuit's characteristic  type is csma-cd.

     LAN L2 ID
         Support: L2

         LAN ID allocated by the LAN level 2 designated router. This attribute
         is supported only if the circuit's characteristic  type is CSMA-CD.

     L1 DESIGNATED ROUTER
         Support: L1,L2

         ID of the DECnet-Plus level 1 designated router on this circuit. This
         attribute is supported only if the circuit's characteristic  type is
         CSMA-CD. If this node does not  participate in the router election
         process, the value returned is  00-00-00-00-00-00.

     L2 DESIGNATED ROUTER
         Support: L2

         ID of the DECnet-Plus level 2 designated router on this circuit. This
         attribute is supported only if the circuit's characteristic  type is
         CSMA-CD. If this node does not  participate in the router election
         process, the value returned is  00-00-00-00-00-00.

     PHASEIV DESIGNATED ROUTER
         Support: L1,L2

         ID of the Phase IV designated router on this circuit. This attribute
         is supported only if the circuit's characteristic  type is CSMA-CD.
         If this node does not  participate in the router election process, the
         value returned is  00-00-00-00-00-00.

     POINT-TO-POINT ID
         Support: L1,L2

         ID allocated to the circuit during its initialization. This attribute
         is supported only if the circuit's characteristic  type is HDLC,
         DDCMP, or X25 static.

     STATE

         State of the routing circuit entity.

         OFF - The circuit is disabled.

         ON  - The circuit is enabled.

6  –  circ_adj

   A routing circuit adjacency entity describes an adjacency, which is a
   neighboring node that is accessible through a particular circuit. The
   circuit-name refers to the circuit associated with  the specified
   adjacency.

6.1  –  status

     DATA LINK PORT
         Support: All

         Name of the data link port used for this X.25 data adjacency. This
         attribute is supported only if the owning  routing circuit entity's
         characteristic  type is set to x25 da.

     DTE ADDRESS
         Support: All

         DTE address of the neighboring node on an X.25 circuit. This status is
         supported only if the owning circuit entity's characteristic type
         is x25 da.

     ENDNODE IDS
         Support: All

         System IDs of neighboring end nodes. This attribute is supported only
         if the node is an end node and the owning circuit entity's
         characteristic type is not x25 da.

     ENDNODE NETS
         Support: All

         NETs computed from the system IDs in the endnode ids status and the
         set of area addresses in the owning routing entity's manual area
         addresses set.  This attribute is supported only if the node is an
         end node and the owning circuit entity's characteristic type is not
         x25 da.

     HOLDING TIMER
         Support: L1,L2

         Holding time for this adjacency, updated from the router-to-router
         Hello messages.  This attribute is supported only if both the node and
         the adjacency are routers.

     IP ADDRESSES
         Support: IP

         IP addresses of the neighbor node. If these are not known, the set  is
         empty.

     LAN ADDRESS

         broadcast circuit. This status is supported only if the owning
         circuit entity's characteristic type is csma-cd.

     LAN PRIORITY
         Support: L1,L2

         Priority of the neighbor of this adjacency for becoming the LAN level
         1 designated router if the adjacency is a DECnet-Plus level 1 router
         or the LAN level 2 designated router if the adjacency is a DECnet-Plus
         level 2 router.  This status is supported only if the owning circuit
         entity's  characteristic type is csma-cd; and the adjacency is a
         router rather than an end node.

     LEVEL
         Support: L1,L2

         The level of the adjacency. This attribute is supported only if both
         the node and the adjacency are routers.

         Level 1      - The adjacency is used for level 1 routing.

         Level 2      - The adjacency is used for level 2 routing.

         Level 1 & 2  - The adjacency is used for level 1 and level 2 routing.

         Level 0      - The usage is undefined.

     NEIGHBOR AREAS
         Support: L1,L2

         Area addresses of the neighboring node. This attribute is supported
         only if both the node and the adjacency are routers and the owning
         circuit entity's characteristic type is not x25 da.

     NEIGHBOR NODE ID
         Support: L1,L2

         Node ID of the neighboring node.

     NEIGHBOR NODE TYPE
         Support: All

         Type of the neighboring node. This status is supported only if the
         owning circuit entity's characteristic type is not x25 da.

         DECnet-Plus endnode        - The node is a DECnet-Plus end node.

         DECnet-Plus level 1 router - The node is a DECnet-Plus level 1 router.

         DECnet-Plus level 2 router - The node is a DECnet-Plus level 2 router.

         DECnet-Plus router         - The node is a DECnet-Plus router.

         non-dna router            - The node is not a DNA router.

         phaseiv endnode           - The node is a Phase IV end node.

         phaseiv level 1 router    - The node is a Phase IV level 1 router.

         phaseiv level 2 router    - The node is a Phase IV level 2 router.

         phaseiv router            - The node is a Phase IV router.

         unknown                   - The node type is unknown.

     NEIGHBOR PROTOCOLS SUPPORTED
         Support: IP

         Network protocols supported by the neighboring node either IP or
         ISO8473.

     ROUTER NETS
         Support: End

         Network Entity Titles NETs of a neighboring router. This status is
         supported only if the adjacency is a level 1 or level 2 router,  and
         the owning circuit entity's characteristic type is not x25 da.

     STATE
         Support: All

         State of the routing circuit adjacency entity.  May be one of the
         following:

         FAILED
         INITIALIZING
         UP
         UP/DORMANT

     TYPE

         Type of adjacency.

         AUTOCONFIGURED - Created by autoconfiguration.

         MANUAL -         Created manually by a create command.

         This attribute indicates whether the adjacency has been manually
         created, or whether the adjacency was created by means of hello PDUs.
         It will always  have the value manual when it has been created by the
         create command; otherwise, it will have the value autoconfigured.

7  –  cir_ip_trn

   A routing circuit ip address translation entity describes  the mapping
   between the IP address of an IP adjacency on a broadcast circuit and its LAN
   address. This entity is supported only on systems that support dual routing.
   ip address translation entities are created automatically, but can be
   deleted manually.

7.1  –  status

     LAN ADDRESS
         Support: IP

         LAN address that corresponds to the IP address of this neighbor.

8  –  cir_ip_rch

   A routing circuit ip reachable address entity describes a manually entered
   subnet address that is accessible by way of a specified circuit. An IP
   reachable address allows a level 2 router at the boundary of a routing domain
   to include information about the address and reachability of subnetworks
   outside the domain. IP reachable addresses exist only on level 2 routers that
   support dual routing.

8.1  –  character

     DESTINATION
         Support: L2,IP

         The IP address and subnet mask to which this reachable address refers.
         This value is derived from the destination argument of the create
         command. You cannot modify this  characteristic.

     DTE ADDRESSES
         Support: L2,IP
         Default: No DTE addresses            Value: Set of DTE addresses

         A set of DTE addresses to which a call may be directed in order to
         reach an address that matches the subnet address given by the  subnet
         address characteristic. You can modify this  characteristic only when
         the entity is disabled. This characteristic is supported only if the
         owning circuit is an X.25 circuit.

     METRIC
         Support: L2,IP
         Default: 20                           Value: 1-maximum link cost

         Default metric value for reaching the specified subnet over this
         circuit. You can modify this characteristic only when the entity is
         disabled.

     METRIC CLASS
         Support: L2,IP
         Default: External                     Value: External or Internal

         Class of the default metric, which controls the preference for this
         route in the decision process.

         EXTERNAL - The I/E bit for the default metric in the External
                    Reachability Information option of level 2 link state
                    packets is set to 1. The subnet address specified by this
                    IP reachable address will have the same preference as level
                    2 external routes.
         INTERNAL - The I/E bit for the default metric in the External
                    Reachability Information option of level 2 link state
                    packets is set to 0. The subnet address specified by this
                    IP reachable address will have the same preference as level
                    2 internal routes.

         You can modify this characteristic only when the entity is disabled.

     NEXT HOP
         Support: L2,IP
         Default: 0.0.0.0                           Value: Ip-address

         IP address of the neighboring node through which the destination is
         reachable. When you create this entity, this characteristic is set to
         the value of the IP address component of the  destination argument
         of the  create command if the IP reachable address is to an IP host.
         This characteristic is not used on circuits of type x25 da. You can
         modify this characteristic only when the entity is disabled.

8.2  –  status

     STATE

         Status of the routing circuit reachable address entity.

         OFF - The IP reachable address is disabled.

         ON  - The IP reachable address is enabled.

9  –  cir_rch

   A routing circuit reachable address entity contains information about a
   manually entered address prefix accessible over that circuit. It exists only
   on L2 routers and end nodes. On L2 routers the type may be outbound or
   inbound. A reachable address of type outbound default describes address
   prefixes in an external domain that are reachable by outbound traffic over
   this circuit. The routing information contained in the reachable address is
   entered directly into the L2 decision process. When ManualL2Algorithm has
   the value routing vector, only reachable addresses with address prefixes
   corresponding to Phase IV areas are fed into the decision process.

   An inbound reachable address describes address prefixes corresponding to
   Phase IV areas which are reachable through the local node by inbound traffic
   over this circuit. The routing information contained in the reachable address
   area and cost is entered into a Phase IV routing vector message, which is
   transmitted periodically over this circuit.

   On an end system the type may be outbound or for a broadcast circuit only
   filter. A reachable address of type outbound behaves in a similar way to that
   on an L2 router except that the routing information is used to control the
   operation of the ES cache. A reachable address of type filter is used to
   specify the permitted LAN address of routers on the LAN which will be used by
   the cache algorithm.

   The circuit-name refers to the circuit associated with the specified
   reachable address.  The address-prefix refers to the reachable address
   managed by this command.

9.1  –  character

     ADDRESS PREFIX
         Support: L2, End
         Default: No default                     Value: Address prefix

         Address prefix to which this reachable address refers. You cannot
         modify this characteristic. This characteristic is set by means of an
         argument to the  create command.

         The value of this characteristic derives from an argument to the
         create command. This characteristic is supported only if the owning
         circuit has type set to x25 da.

     COST
         Support: L2
         Default: 20                            Value: 1-63

         Cost of reaching this address prefix over this circuit.

     DATA FORMAT
         Support: L2
         Default: DECnet-Plus                   Value: Phase IV or DECnet-Plus

         The PDU data format to be used when forwarding data or error report
         NPDUs using this reachable address.

         This attribute is supported only if the type characteristic is set
         to outbound. You can modify this characteristic only when the entity
         is disabled.

     DTE ADDRESSES
         Support: End,L2
         Default: No DTE addresses               Value: set of DTE addresses

         A set of DTE addresses to which a call may be directed in order to
         reach an address that matches the address prefix of this reachable
         address.

         This characteristic is supported if the node is a level 2 router,
         where the owning circuit's characteristic type is one of the X.25
         circuit types, and the reachable address's characteristic type is
         outbound. It is also supported by end nodes operating over an x25
         da circuit. You can modify this characteristic only when the entity
         is disabled.

     ISDN ADDRESS
         Support: L1,L2
         Default:

         A full set of E.164 ISDN network addresses that a call may be directed
         in order to reach a network number that matches the address prefix of
         the parent reachable address entity. Associated with each ISDN
         network address, but not visible to Network Management, is a variable
         last failure of type binary absolute time. This attribute is supported
         only if access type is ISDN DA.

     LAN ADDRESS
         Support: L2,End
         Default: 00-00-00-00-00-00                     Value: id

         A single LAN address to which an NPDU can be directed in order to reach
         an address that matches the address prefix of this reachable address.
         This characteristic is supported only if the owning circuit's
         characteristic type is csma-cd, and the reachable address's
         characteristic type is outbound. You can modify this characteristic
         only when the entity is disabled.

     MAPPING
         Support: End,L2
         Default: X.121                                 Value: Manual or X.121

         Type of mapping used to determine the SNPA address to which a call
         should be placed for this address prefix. You can modify this
         characteristic only when the entity is disabled. If the circuit is a
         broadcast circuit, this attribute must have the value manual.

         MANUAL - The mapping uses the set of addresses in the characteristic
                  dte addresses or the address in the characteristic LAN
                  address.

         X.121 -  The mapping uses the X.121 address extraction algorithm.

        This characteristic is supported only if either of the following
        conditions is satisfied:

        o  The node is a level 2 router or an end node, and the owning circuit's
           characteristic type is one of the X.25 circuit types.

        o  The node is a level 2 router, the owning circuit's characteristic
           type is csma-cd, and the reachable address's characteristic type
           is outbound.

     METRIC TYPE
         Support: L2
         Default:

         The metric type of the cost metric for the circuits. If internal, the
         I/E bit for the metric in the Prefix Neighbors option of L2 LSPs is set
         to 0, otherwise external is set to 1.

     TYPE
         Support: L2,End
         Default: Outbound                        Value: see below

         Type of the reachable address.  You can modify this characteristic only
         when the entity is disabled.

         INBOUND  - For L2 only, the address prefix corresponds to a Phase IV
                    area that is reachable through this node and circuit by
                    inbound traffic.

         OUTBOUND - The address prefix is in an external domain that is
                    reachable over this circuit by outbound traffic.

         FILTER   - The address prefix defines a set of addresses that should be
                    reached via the set of routers listed in the permitted LAN
                    address characteristic.

9.2  –  status

     STATE

         State of the routing circuit reachable address entity.

         OFF - The reachable address is disabled.

         ON  - The reachable address is enabled.

10  –  dest_area

   A routing destination area entity contains information about a destination
   area or reachable address prefix.  These entities are created and deleted
   dynamically by the Routing module.

   Destination areas exist only on nodes that are level 2 routers.

10.1  –  stATUS

     COST
         Support: L2

         Cost of the least cost paths to this destination area.

     OUTPUT ADJACENCIES
         Support: L2

         Set of routing circuit and routing circuit adjacency or routing
         circuit reachable address entity names that represent the forwarding
         decisions for this destination area.

11  –  dest_node

   A routing destination node entity contains information about a particular
   destination node within the same area as this node. These entities are
   created and deleted automatically by the Routing module. Destination nodes
   exist only on nodes that are level 1 or level 2 routers.

11.1  –  status

     COST
         Support: L1,L2

         Cost of the least cost paths to this destination node.

     NETS
         Support: L1,L2

         Set of NETs computed from the system ID that is the entity's name and
         the area addresses in the routing entity's manual area addresses
         set.

     OUTPUT ADJACENCIES
         Support: L1,L2

         Set of routing circuit and routing circuit adjacency entity names
         representing the forwarding decisions for this destination node.

12  –  route_egp_grp

   A routing egp group entity defines a set of systems in the same autonomous
   system with which this system may exchange EGP messages. This entity is
   supported only on level 2 routers that support dual routing and, in
   particular, the EGP routing protocol.

12.1  –  character

     AUTONOMOUS SYSTEM NUMBER
         Support: L2,IP
         Default: 0                              Value: 0-65535

         The autonomous system number common to members of this group. You can
         modify this characteristic only when the entity is disabled. This
         attribute is supported only if the node is a level 2 router, and if the
         system supports dual routing both DECnet and IP routing.

     EXTERNAL ROUTES
         Support: L2,IP
         Default: Receive                        Value: Set of send,recieve

         If the set includes receive, external gateway routes are accepted from
         neighbors in the group; if the set does not include receive, external
         gateway routes are discarded. If the set includes send, external
         gateway routes will be sent to neighbors in this group; if the set does
         not include send, external gateway routes are not sent. You can modify
         this characteristic only when the entity is disabled.

     MAXIMUM ACTIVE NEIGHBORS
         Support: L2,IP
         Default: 1                              Value: 0-255

         The maximum number of neighbor systems in the group that this system
         will attempt to acquire and maintain in the Up state at any given time.
         You can modify this characteristic only when the entity is disabled.

     RECEIVE METRIC CLASS
         Support: L2,IP
         Default: External                       Value: Internal or External

         The class to be associated with routes received from EGP neighbors in
         this group unless overridden by a routing receive route entity. You
         can modify this characteristic only when the entity is disabled.

     SEND LOCAL METRIC
         Support: L2,IP
         Default: 1                              Value: 0-255

         The metric value to be used when announcing routes derived from local
         information unless overridden by a routing send route entity. You
         can modify this characteristic only when the entity is disabled.

     SEND METRIC CLASSES
         Support: L2,IP
         Default: Internal                    Value: Set of external, internal

         Routes received through routing protocols other than EGP with metric
         classes in this set are candidates for announcement in EGP messages
         sent to neighbors in this group, subject to route propagation policy.
         Routes with metric classes not specified in this set will not be
         announced.  You can modify this characteristic only when the entity is
         disabled.

     SEND REPLACEMENT METRIC
         Support: L2,IP
         Default: 1                              Value: 0-255

         Specifies the metric value to be used when announcing routes derived
         from non-EGP routing protocols unless overridden by a routing send
         route entity.  You can modify this characteristic only when the
         entity is disabled.

12.2  –  status

     STATE

         State of the routing egp group entity.

         OFF - The entity is disabled.
         ON  - The entity is enabled.

13  –  egp_neghbr

   A routing egp group egp neighbor entity defines one of the systems in the
   autonomous group defined by the owning egp group entity.  This entity is
   supported only on level 2 routers that support dual routing and, in
   particular, the EGP routing protocol.

13.1  –  character

     CIRCUIT

         Simple-name of the circuit.

     IP ADDRESS
         Support: L2,IP

         Internet address of this EGP neighbor. The value of this characteristic
         is derived from the ip address argument of the create command. You
         cannot modify this characteristic.

     NEXT HOP
         Default: 0.0.0.0                       Value: IP address

         IP address and the next routing node.

     SOURCE NETWORK
         Default: 0.0.0.0                       Value: Network number

         Network number to query.

13.2  –  counters

     ERROR MESSAGES RECEIVED
         Support: L2,IP

         Number of EGP error messages received from this neighbor.

     ERROR MESSAGES SENT
         Support: L2,IP

         Number of EGP error messages sent to this neighbor.

     MESSAGES RECEIVED
         Support: L2,IP

         Number of EGP messages received without error from this neighbor.

     MESSAGES SENT
         Support: L2,IP

         Number of EGP messages sent to this neighbor.  Note that this value
         does not include EGP messages counted by the counter send messages
         discarded.

     RECEIVED MESSAGES DISCARDED
         Support: L2,IP

         Number of EGP messages received from this neighbor with any kind of
         error.

     SEND MESSAGES DISCARDED
         Support: L2,IP

         Number of EGP messages not sent to this neighbor because of resource
         limitations within the egp entity.

     START EVENTS
         Support: L2,IP

         Number of times the EGP neighbor has been manually started.

     STATE CHANGES FROM UP
         Support: L2,IP

         Specifies the number of times the EGP state of this neighbor changed
         from Up to some other state.

     STATE CHANGES TO UP
         Support: L2,IP

         Specifies the number of times the EGP state of this neighbor changed
         to Up from some other state.

     STOP EVENTS
         Support: L2,IP

         Number of times the EGP neighbor has been manually stopped.

13.3  –  status

     EGP STATE
         Support: L2,IP

         EGP state of the system with respect to this EGP neighbor.

         ACQUISITION   IDLE
         CEASE         UP
         DOWN

     HELLO TIME
         Support: L2,IP

         Interval, in hundredths of a second, between retransmissions of EGP
         Hellos. This value represents the t1 timer defined in RFC 904.

     LAST EVENT
         Support: L2,IP

         Specifies whether the last event issued on this EGP neighbor was a
         start or a stop event.

         START - The last event was a start.
         STOP  - The last event was a stop.

         This is the value with which an EGP neighbor is created, before either
         a start or stop command has been issued.

     POLLING MODE
         Support: L2,IP

         Polling mode of the EGP entity with respect to this neighbor as either
         active or passive.

     POLL TIME
         Support: L2,IP

         Interval, in hundredths of a second, between retransmissions of EGP
         polls. This value represents the t3 timer defined in RFC 904.

     STATE

         State of the routing egp group egp neighbor entity.

          ON  - The entity is enabled.
          OFF - The entity is disabled.

14  –  ip_dest

   A routing ip destination address entity describes IP routing information
   in the shortest paths database. This entity is supported only on routers that
   support dual routing.

14.1  –  status

     LEVEL
         Support: L1,L2,IP

         Level at which the shortest path exists in the shortest paths database.

         Level 1
         Level 2 External
         Level 2 Internal

     METRIC
         Support: L1,L2,IP

         Default metric value for the shortest path to the destination
         subnetwork.

     PATHS
         Support: L1,L2,IP

         Equal cost paths for this route. The following information appears for
         each path:

         o  The name of the entity pair that represents the forwarding decision
            for this path circuit and one of adjacency, IP adjacency, or IP
            reachable address.

         o  The routing mechanism through which the route was learned:

              LOCAL  -- the route is derived from the subnet address or
                        alternative subnet addresses characteristics of a local
                        circuit.
              NETMGNT-- the route is derived from manually configured
                        information on the local system.

        o  The number of seconds since the route was last updated.

15  –  routing p_nghbr

   A routing permitted neighbor entity represents a neighboring node on a
   nonbroadcast circuit that is permitted to connect to this node.

15.1  –  character

     ID
         Support: All
         Default: No default                      Value: NOde ID

         Node ID of a potential neighbor node. You cannot modify this
         characteristic. This characteristic is set by means of an argument to
         the create command.

     VERIFIER
         Support: All
         Default: No verifier                     Value: Hex-string, length 0-38

         Verifier to be checked from this neighbor. You may change this
         characteristic at any time; however, the change will not take effect
         until the circuit is next initialized. You cannot display this
         characteristic.

         If the verifier is not set, then a connection to the neighboring node
         whose ID matches the ID in this entry is allowed.  If the verifier is
         set, the connection is allowed only if the verifier sent by the remote
         node matches the one in this entry.

16  –  port

   A routing port entity represents a client of the Routing module, and
   presents information associated with that client.

16.1  –  counter

     DATA SDUS RECEIVED
         Support: All

         Number of data NSDUs delivered across Transport interface after
         reassembly.

     ERROR REPORTS RECEIVED
         Support: All

         Number of error report PDUs delivered across Transport interface.

     EXPIRED SEGMENTS DISCARDED
         Support: All

         Number of segments discarded because lifetime expired during reassembly.

     IP PACKETS REASSEMBLED
         Support: IP

         Number of IP packets that have been successfully reassembled from
         fragments.

     SDUS TRANSMITTED
         Support: All

         Number of data NSDUs requested for transmission across Transport
         interface.

     SEGMENTS DISCARDED
         Support: All

         Number of segments data- or error-report discarded before delivery
         across the Transport interface, including segments discarded for any
         reason other than lifetime expiration during reassembly.

     SEGMENTS RECEIVED
         Support: All

         Number of data- and error-report NPDUs received before reassembly.

16.2  –  status

     CLIENT
         Support: All

         Name given by the user of the port when the port was opened.

     NSAP ADDRESSES
         Support: All

         Set of NSAP addresses to be received at this port. This attribute is
         supported only if the status attribute type is not set to IP.

     NSAP SELECTOR
         Support: All

         Network service access point NSAP selector octet supplied by the
         client. This attribute is supported only if the status  attribute
         type is not set to ip.

     PROTOCOL TYPE
         Support: IP

         Value of the IP protocol field specified by the client.

     TYPE

         Support: IP

         Type of connectionless network service to be used:  IP or ISO8473.
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